I used to be a Mirage dealer. Do you have the first gen M1's with the soft tweeters or the second gen with the aluminum tweeters? That's important because there's a big difference between the two.
Assuming this system is going to be used for stereo 2 channel listing, (no surround) you may want to change your preamp first. It will make a far bigger difference than cables.
Assuming this system is going to be used for stereo 2 channel listing, (no surround) you may want to change your preamp first. It will make a far bigger difference than cables.